تقرير
Dislocation drag and its influence on elastic precursor decay
| العنوان: | Dislocation drag and its influence on elastic precursor decay |
|---|---|
| المؤلفون: | Blaschke, Daniel N., Luscher, Darby J. |
| المصدر: | Int. J. Plast. 144 (2021) 103030 |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | Plastic deformation is mediated by the creation and movement of dislocations, and at high stress the latter is dominated by dislocation drag from phonon wind. By simulating a 1-D shock impact problem we analyze the importance of accurately modeling dislocation drag and dislocation density evolution in the high stress regime. Dislocation drag is modeled according to a first-principles derivation as a function of stress and dislocation character, and its temperature and density dependence are approximated to the extent currently known. Much less is known about dislocation density evolution, leading to far greater uncertainty in these model parameters. In studying anisotropic fcc metals with character dependent dislocations, the present work generalizes similar earlier studies by other authors. Comment: 28 pages, 16 figures; v2 improved the presentation |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.ijplas.2021.103030 |
| URL الوصول: | http://arxiv.org/abs/2101.10497 |
| رقم الأكسشن: | edsarx.2101.10497 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.ijplas.2021.103030 |
|---|